By PresidĂȘncia do MĂ©xico (Flickr) [CC BY 2.0], via Wikimedia Commons
Mark Zuckerberg
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Elon Musk
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Charles_Darwin_by_Maull_and_Polyblank,_1855-crop
Charles Darwin
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Von_Braun.
Wernher von Braun
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Stephen Hawking
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A._P._J._Abdul_Kalam_in_2008[1]
A. P. J. Abdul Kalam
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Francesco_Melzi_-_Portrait_of_Leonardo_-_WGA14795[1]
Leonardo da Vinci
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